I am a reasonably experienced UK diver and was looking for somewhere to do a couple of holiday dives whilst in Crete. i did one dive with another centre which was simply dangerous (no buddy checks, no briefing, scary). I did two with this centre. They know the area very well and have a clear idea of where to dive. Thorough briefing, buddy checks, safety stops.
One thing to be aware of in Northern Crete is that the lack of fish life means the best dives tend to be cave dives, so you may well be pushed into doing that. Keep to your personal limits, if you don't want to cave dive don't.
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